Window screen



DCC. 2,V 1930. i L Evl 1,783,732

y v wINDow SCREEN Filed July 51, 1929 Patented Dec. 2, 1930 ENTQFFICE Louis ravi, or, WINTHROB;iiiisslicrinsarms l WINDOW sonnen Application mea July `31,

This inventionV is embodied in a Windowscreen including asingleinner frame carry-V ing the'usual'screenfabric and invariable in size, a housing trame. embracing the inner frame and formed to engage vertical screen guides on a Windowcasing, t-he housing frame i being variable `in size horizontally and invariable vertically, and springsceopeiating with said frames to permit convenient engageinent of the. housing frame With the screen guides', and compensate -foivar'iatioiis inthe distance between the screen guides, caused by svvellingand shrinking of the casing. Y i

* Of the accompanying drawings forming a partof this specificatiom;

Figure lis a perspective view of a housing fra-me constituting 4 an 'element yoit" my ima. proved screen. l

Figures 2, 3,4 and 5' are fragmentary perspective views, showing portions of the meinbersof the housing frame. v'

Figure 6 shoWs in ,side'elevation the inner frame and its screen fabric, and a portion et'. 27 the 'housing frame, another vportion of the housing frame being' shown in section;

Figuref is a sectionfon line 7 7 of Figure 6. Y

Figure 6 is a section on line 8'-8 of4 Fig- 3@ ure 6.v

VThe same reference "cha 'aciers indicatethev same parts in all of the ligures."

The variable inner frame of my improved screen is rectangular and composed of rigidly connected metal members including vertical members 12, and horizontal members 14, and :i filling of screen fabric, secured in any suitable Way to the frame members.

The variable housing `ianie, shown sepa rately by Figure 1 is rectangular, embraces the inner frame, is engageable with the usual fixed screen guides g onv a Window casing c, and is variable in lengtlihorizontally to permit the convenient engagement ,of theriranie with the guides, and compensate ior differences in the distance between the guides caused by swelling and shrinking of the cas-V in l A, Y

aid housing frameis composed of t-Wo angular sheet metal sections, each comprising aV 1929- 'Sei-"eisen 38ami vertical screen guide-engaging member, and two horizontal members fixed to and projecting fromthe ends of the vertical member, the

liorizontal'inembers of one section being teleu scopically intereiigaged Wit-h and slidablef in thoseV of the other, to vary the" 'horizontal length of the outer frame.' The vertical meinber fotone section designated as aiwhole'by 16,',and the vertical member ofthe other s e`c" tion by 16a: FEac'h Vverticalmember is prete'rably maide fronra single piece of sheet steel JV and' includes'two substantially,parallel Wings 17, forming the sideslof a channel 'andfa neck i 18' connfecting the Wings, said neck being grooved vfrom end' to end tofslidablyengage a screen guide g1 The 'horizontal members ofmtlielsection `which: `includes thevert'ical member 16, are

"Tdes'ignated as' a'wliole byl9, and eachl is ',preferablylmadefrom a single pieceof sheet steel and inclurdestwo parallelwings 2O forniing the sides 'of av channel anda' neck 21 con-V nect-ing the Wings, the Wings 2O being united .to 'the Wings i17,01 themember- 16, preferably byelectric spot Welding. Y p VThe horizontal members of; the section which includes the verticalV member 16a, are:

designated as'awhole by 21, and each is pref-f erablyfmaddfrom, a single `piece of sheet: steel,- andf-include's `tWo parallel Wings V122 forming the sidesof a channel anda neck 23 connecting the ivings, the wings 22 being` unitedjto the Wings `17 ofthemember 16a, preferablybyspot Welding.V f U "f Thelhorizontal members 21 are `reduced to enterand slide j in the members 19.,` The wings are provided Wit-li :hooked flangesl '24, engaging the outer edges ofthe WingsV 21.

Springs y25` (Figure 6 Vand 7) `preferably spoteweloled to the inner sides of the grooved necksrl8,`are rigidly backedby the vertical members 13 of the inner frame, Vand exert outward. pressurefon the vertical. members of the-,housing frame, tending to lautomaticallyaelongateand permit the contraction of the housing traine horizontally and maintain .thegrooved necks inrengagement `With the guides *9, regardless of swelling and` shrink-` ing,the1inner,fraine serving as a rigid abutment for the springs.

It will now be seen that the members of the housing frame are channelled or recessed to receive and cover the members 13 and 14 of the inner frame, and that the horizontal 5 length of the housing frame is variable, so that the grooved necks 18 may be conveniently engaged with the screen guides g, and automatically conformed to variations of the distance between said guides caused by the swelling and shrinking of the window casing.

It is to be noted that the single inner frame and the outer frame composed of recessed members embracing the inner frame, collectively constitute a screen of minimum thick- 15 ness, without spaces or openings through which insects may enter, the screen being in this respectmuch more desirable than one having two or more fabric-carrying frames located side by side.

It will be seen that the screen constructed as described constitutes a complete articleof manufacture engageable as a unit with the screen guides and adapted to conform auto matically to such variations of the distance 2,-, between said guides as may be caused by the swelling and shrinking of the casing. These variations are a frequent source of trouble, particularly those which decrease the distance between the guides and are liable to cause binding of the guides on the vertical members of the screen.

Iclaim: 1,

As an article of manufacture, a window screen engageable as a unit with the fixed ver- 35- tical screen guides of a window frame, and

comprising a single invariable rectangular inner frame, including horizontal bottom and top members, vertical end members, and a illing of screen fabric, and a horizontally vaie riable and vertically invariable rectangular housing frame, vcomposed of two angular channelled sheet metal sections, each open at one end and including channelled horizontal lower and upper members telescopically in- 4 tercngaged to permit horizontal variation of the housing frame, and channelled vertical members connecting said horizontal members in pairsand provided with screen-guide engaging grooves, the channelled members of 5H the housing frame receiving the members of the inner frame, and springs interposed between the vertical members of the two frames, said springs being rigidly backed by the vertical. members of the inner frame, and bearing on the vertical members of the housing frame, to horizontally vary the latter and thereby permit horizontal contraction of the housing frame when the screen is being engaged with the screen guides, and automat- 6; ically compensate for variations in the distance between the screen guides caused by swelling and shrinking of the window casing. In testimony whereof I have affixed my signature.

Louis Levi. 

